Fetal phonocardiography is the acoustic signals recorded from the maternal abdominal surface using acoustic sensors. It carries valuable information pertaining to the physiological state of unborn baby in the womb and has the potential for detection of structure abnormality like pathological murmur, split sound [14, 15].
Under normal condition the mechanical action of fetal heart produces two distinct sound S1 and S2 in each cardiac cycle. The sound S1 is heard due to the closure of mitral and tricuspid valves, while S2 is heard due to the aortic and pulmonary valves. Along with these sounds some noises of very low amplitude with frequency between 0 to 25 Hz also produced due to fetal movement, mother heart sound [16]. The circulation of
Under normal condition the mechanical action of fetal heart produces two distinct sound S1 and S2 in each cardiac cycle. The sound S1 is heard due to the closure of mitral and tricuspid valves, while S2 is heard due to the aortic and pulmonary valves. Along with these sounds some noises of very low amplitude with frequency between 0 to 25 Hz also produced due to fetal movement, mother heart sound [16]. The circulation of